我场地处姚北平原,系粉砂粘壤土。在毛主席革命路线指引下,实行科学种田,近年来产量逐步上升。一九七四年全场242亩粮田,全年亩产达到1902斤。产量能否进一步上去,根据作物的不同生育期,不同的需水量,合理地科学用水,改变灌水方法,亦是值得研究探讨的一个重要内容。水稻需要水,而又怕水。水稻田间管理的中心环节是水,各种栽培措施都要通过水才能发挥作用。生产水平达到比较高的程度以后,用好水,不使作物产生水害,是减轻病虫害,促进水稻高产更高产的中心环节。密植足苗以后,土壤中根系也相应增加,相互争肥料,根系呼吸作用就强,会呼出大量的有害物质,同时肥料分解时,也要放出有害气体,即氧化还原物质逐步增加,由于长期漫灌,土中缺少氧气,有害气体无法排出,还原 My site is located in Yao North Plains, Department of silty clay loam. Under the guidance of Chairman Mao’s revolutionary line, the implementation of scientific farming has shown a gradual increase in output in recent years. In 1974, a total of 242 mu of grain fields were produced, and the annual output of mu reached 1902 kilos. Whether the yield can be further increased, according to the different growth stages of crops, different water requirements, reasonable scientific use of water, and change of irrigation methods, is also an important part of research. Rice needs water and is afraid of water. The key aspect of paddy field management is water, and all cultivation measures must be made through water. After the production level reaches relatively high level, it is a key link to reduce pests and diseases and promote high yield and high yield of rice with good water and no crop water damage. After dense planting of seedlings, the soil roots also increased accordingly, competing for fertilizers, root respiration is strong, will exhale a lot of harmful substances, while decomposition of fertilizers, but also release harmful gases, that is, redox substances gradually increased due to long-term flood irrigation , Lack of oxygen in the soil, harmful gases can not be discharged, reduction